Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer has detected a problem with the sensor that checks how much power the brake booster is using. It's like when a toy uses too many batteries and the remote control says something is wrong.
The P11FF code is triggered when the vehicle's computer detects a high voltage signal from the brake booster current sensor, indicating an issue in the sensor circuit.
The brake booster current sensor monitors the electrical current used by the brake booster. If the sensor detects a higher than normal current, it sends a signal to the ECM (Engine Control Module), which then triggers the P11FF code. This could be due to a short circuit, a faulty sensor, or issues with the wiring.
• Illuminated check engine light
• Reduced braking performance
• Unusual noises from the brake system
• Faulty brake booster current sensor
• Short circuit in the sensor wiring
• Corroded or damaged electrical connectors
Brake Booster: A device that uses vacuum or hydraulic pressure to assist in braking.
ECM: Engine Control Module, the computer that manages engine functions.
• Scan the vehicle for OBD-II codes.
• Inspect the brake booster current sensor and wiring for damage.
• Test the sensor's voltage and resistance.
• Replace the brake booster current sensor.
• Repair or replace damaged wiring or connectors.
• Clear the OBD-II codes and test drive the vehicle.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $400
Moderate
• Toyota Camry
• Honda Accord
• Ford Fusion
• Regularly inspect brake system components.
• Ensure electrical connections are clean and secure.
• Schedule regular vehicle maintenance.
Sensor Issue
• Avoid driving at high speeds until the issue is resolved.
• Have a professional mechanic inspect the vehicle as soon as possible.
Check if the brake system components are covered under the vehicle's warranty.
The P11FF code has been reported in vehicles with advanced braking systems, particularly those with electronic brake boosters.
Moderate – While the vehicle may still be drivable, reduced braking performance can be dangerous.
Driving with a faulty brake system can lead to accidents. It is important to address this issue promptly.
• Vehicle parked on a level surface
• Engine running
The brake booster current sensor is typically located near the brake booster unit in the engine bay.
Q: Can I drive with a P11FF code?
A: It's not recommended to drive with this code as it can affect braking performance and safety.
Q: How do I reset the P11FF code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue persists, further diagnosis is needed.
Pro · Four-system diagnostics
A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.
Chassis and ABS faults usually need a scanner that can read brake-system data directly.
View on Amazon
Universal · Torque wrench
Useful when reassembly torque matters for wheel, suspension, and under-hood fasteners.
Useful when wheel, hub, or suspension hardware needs correct reassembly torque.
View on Amazon
Universal · Drive-on ramps
Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.
Helpful for safer access during underbody inspection work.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.